According to Au7o's analysis of 4,190+ owner reports, the 2021-2025 Volkswagen ID.4 has 21 documented known issues, with 13 rated critical. The most serious are 12V Auxiliary Battery Drain and Dead Battery ($0-$400 repair), Heat Pump System Failure in Cold Weather ($0-$2,500 repair), High-Voltage Battery Cell Module Fire Risk and Range Loss (Self-Discharge) ($0-$0 repair), Pulse Inverter / HV Battery Management Reset Causing Sudden Loss of Drive Power ($0-$0 repair), Electronic Door Handle Water Intrusion Causing Doors to Open Unexpectedly ($0-$0 repair), Chassis, Brake or Suspension Bolts Incorrectly Tightened — Recall 25V434 ($0-$0 repair), HV Battery Flexible Printed Circuit Assembly (FPCA) Solder Defect Causing Sudden Stall ($0-$0 repair), Instrument Cluster Fails to Display Transmission Gear Position Indicator (Rollaway Risk) ($0-$0 repair), Passenger Frontal Airbag May Be Incorrectly Folded — Recall 22V858 ($0-$0 repair), Passenger Frontal Airbag Inflator Retaining Fasteners Loose (Improper Deployment) ($0-$0 repair), Seat-Belt Automatic Locking Retractor Missing or Deactivating Early — Child-Restraint Recall ($0-$0 repair), Electric Drive Motor Sealing Ring Misassembled — Coolant Leaks Into the High-Voltage System ($0-$0 repair) and Onboard Charger (OCDC) Condensation Failure Stopping 12V Charging ($0-$0 repair). The most commonly reported issue is ID. Software Infotainment Bugs, Slow Response, and OTA Update Failures with 2,100 owner reports. Across all issues with published estimates, repair costs range from $50 to $2,500. DIY maintenance guides at au7o.io.